A model and an algorithm were provided for constructing phylogenetic tree based on the principle of maximum likelihood estimate.
利用最大似然估计原理，给出了构建系统发生树的模型和算法。
Phylogenetic tree analysis based on pretreatment HVR1 sequences was undertaken. Results The E2 HVR1 sequences from pre treatment sera were highly diverse among different isolates.
结果治疗前的HVR1区氨基酸序列高度变异，基于HVR1序列的种系发生树提示序列变化与干扰素应答类型无关。
The evolutional tree of these 20 languages and the phylogenetic tree of these 29 animals were reconstructed based on the two LZ complexity distance matrices.
基于LZ复杂性距离 矩 阵，重构了20种 语言的 语言关系树和29种哺乳动物的系统进化树。
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